Divergent selection and local adaptation in disjunct populations of an endangered conifer, Keteleeria davidiana var. formosana (Pinaceae).
Divergent selection and local adaptation in disjunct populations of an endangered conifer, Keteleeria davidiana var. formosana (Pinaceae).
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DOI：
10.1371/journal.pone.0070162
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发表时间：
2013
期刊：
影响因子：
3.7
通讯作者：
Hwang SY
中科院分区：
文献类型：
--
作者：
Fang JY;Chung JD;Chiang YC;Chang CT;Chen CY;Hwang SY
摘要本研究以台湾省农业委员会列为濒危物种的台湾油杉（Keteleeria davidiana var. formosana） 5个居群为研究对象，分析其遗传多样性、居群结构、fst异常值、连锁不平衡程度及模式。12对扩增片段长度多态性引物共产生465个标记，其中平均83.74%的标记在群体间多态，平均Nei’s遗传多样性为0.233，遗传分化水平较低（约6%）。连锁不平衡分析和HICKORY分析表明，台湾大楸最近出现了种群瓶颈和近交现象。基于不同聚类情景的总数据集，STRUCTURE和BAPS都观察到群体中个体基因型的广泛混合，这可能是由于祖先变异的谱系分类不完整，而不是近期基因流动的高速率。我们基于离群值分析的结果显示，遗传分化水平普遍较高，并表明由环境变化引起的分化选择是由温度、降水和湿度的差异驱动的。在环境不同的种群中识别生态相关的异常值进一步支持了差异选择和潜在的局部适应。
The present study investigated the genetic diversity, population structure, F ST outliers, and extent and pattern of linkage disequilibrium in five populations of Keteleeria davidiana var. formosana, which is listed as a critically endangered species by the Council of Agriculture, Taiwan. Twelve amplified fragment length polymorphism primer pairs generated a total of 465 markers, of which 83.74% on average were polymorphic across populations, with a mean Nei’s genetic diversity of 0.233 and a low level of genetic differentiation (approximately 6%) based on the total dataset. Linkage disequilibrium and HICKORY analyses suggested recent population bottlenecks and inbreeding in K. davidiana var. formosana. Both STRUCTURE and BAPS observed extensive admixture of individual genotypes among populations based on the total dataset in various clustering scenarios, which probably resulted from incomplete lineage sorting of ancestral variation rather than a high rate of recent gene flow. Our results based on outlier analysis revealed generally high levels of genetic differentiation and suggest that divergent selection arising from environmental variation has been driven by differences in temperature, precipitation, and humidity. Identification of ecologically associated outliers among environmentally disparate populations further support divergent selection and potential local adaptation.
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影响因子：
4.9
作者：
Despres, L;Loriot, S;Gaudeul, M
通讯作者：
Gaudeul, M
DOI：
10.1046/j.1471-8278.2000.00014.x
发表时间：
2001-03-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
--
作者：
Agapow, PM;Burt, A
通讯作者：
Burt, A
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y
影响因子：
2.2
作者：
Bothwell, Helen;Bisbing, Sarah;Manel, Stephanie
通讯作者：
Manel, Stephanie
影响因子：
10.7
作者：
Bonin, A;Taberlet, P;Pompanon, F
通讯作者：
Pompanon, F